Conventional hard resin lenses are half the weight of glass lenses and can be tinted to almost any color and density. Hard resin lenses are more easily scratched than glass but can have an optional scratch protectant applied. Hard resin lenses are more impact resistant than glass.
Modern technology has created lenses that bend light faster, therefore, stronger corrections are thinner than when made in conventional materials. Such lenses are called “high-index” and stronger corrections are more attractive because they are slimmer. High index lenses are lighter in weight than other materials. High index lenses absorb all harmful UV light and can be tinted to any shade or color.
These are lenses that darken automatically as you go from indoors to outdoors. There are four Transitions brand lenses: Transitions, Transitions Extra Active, Transitions Vantage, and Transitions Drivewear. Ask for a demonstration of Transitions lenses. Transitions lenses are the most popular photochromic lens in America.